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Finding the Fourth Proportional to 57,480.71, 86,221.46 and 20,040.68

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Solution

The fourth proportional to 57,480.71, 86,221.46 and 20,040.68 is: 30,061.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,480.71 : 86,221.46 = 20,040.68 : x
  2. Step 2: Convert to fraction form
    57,480.71/86,221.46 = 20,040.68/x
  3. Step 3: Cross multiply
    57,480.71x = 86,221.46 × 20,040.68
  4. Step 4: Simplify right side
    57,480.71x = 1,727,936,954.65
  5. Step 5: Solve for x
    x = 1,727,936,954.65/57,480.71
  6. Step 6: Final answer
    x = 30,061.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.